>Beyond that, the "colloquial" use is simply incorrect.
Doesn't matter, language follows use, not etymology or geography. If a term has been established as something (in actual use) then it will be used, doesn't matter if it's not technically correct (same way "Indians" was used for centuries for Native Americans, and only fell out of use because of political concerns, not because it was also obviously incorrect and based on a misunderstanding of a whole continent).
Doesn't matter, language follows use, not etymology or geography. If a term has been established as something (in actual use) then it will be used, doesn't matter if it's not technically correct (same way "Indians" was used for centuries for Native Americans, and only fell out of use because of political concerns, not because it was also obviously incorrect and based on a misunderstanding of a whole continent).